Open Source Point of Sale is a web based point-of-sale application written in PHP using the CodeIgniter framework. Prior to version 3.4.3, a Stored Cross-Site Scripting (XSS) vulnerability exists in the Stock Locations configuration feature. The application fails to properly sanitize user input supplied through the stock_location parameter, allowing attackers to inject malicious JavaScript code that is stored in the database and executed when rendered in the Employees interface. This vulnerability is fixed in 3.4.3.
The CVSS score for this vulnerability is 5.4, which indicates a medium severity level. The implications of this flaw can have significant impacts on confidentiality and integrity, although the availability remains unaffected. Organizations utilizing this application should recognize the potential risks associated with such vulnerabilities.
Risk to organizations includes unauthorized execution of scripts leading to data leakage and potential user impersonation. Given the nature of this vulnerability, attackers may leverage it to execute harmful scripts that could compromise sensitive information or manipulate application behavior.
Organizations should prioritize patching immediately. The urgent action is warranted not only to protect against potential exploitation but also to maintain trust with customers and stakeholders.
Vulnerability Details
The official CVE description states that this vulnerability allows attackers to inject malicious JavaScript code into the Stock Locations configuration feature. As a result, it is classified under CWE-79, which pertains to improper neutralization of input during web page generation (Cross-site Scripting). The CVSS 3.1 vector for this issue is AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.
Affected products include all versions of Open Source Point of Sale prior to 3.4.3. The vulnerability was published on April 7, 2026, and the analysis status indicates it has been fully examined.
Technical Analysis
The root cause of this vulnerability lies in the application's failure to sanitize user input, specifically the stock_location parameter. This lack of proper input validation allows attackers to inject scripts that are stored and later executed within the application context.
The attack vector is network-based, which means an attacker can exploit this vulnerability remotely. The attack complexity is rated as low since it does not require advanced skills to execute. Privileges required are low, as the exploitation can occur by any user with access to the stock location feature.
User interaction is required, as the victim must view the page where the injected script is executed. The impact on confidentiality and integrity is low, as the vulnerability primarily allows for script execution rather than direct data theft. Availability remains unaffected by this vulnerability.
Risk & Impact Analysis
The real-world deployment risk associated with this vulnerability is significant, particularly for organizations that rely on Open Source Point of Sale for financial transactions. Attackers exploiting this vulnerability can compromise sensitive data, leading to unauthorized access or manipulation of transactional information.
Given the potential for data leakage and the impact on user trust, this vulnerability represents a critical concern for security teams. The blast radius could include all users interacting with the affected application, emphasizing the need for immediate remediation.
Considering the CVSS score of 5.4, the urgency for remediation should be addressed in the priority patch cycle. Organizations should assess their deployment to determine exposure to this vulnerability and take appropriate steps to mitigate risk.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
All versions of Open Source Point of Sale prior to 3.4.3 are affected by this vulnerability.
Mitigation & Remediation
Organizations should apply the patch to upgrade to Open Source Point of Sale version 3.4.3 or later to remediate this vulnerability. If immediate patching is not feasible, implement input validation and output encoding to mitigate the risk of XSS attacks.
Furthermore, organizations can enhance security through configuration hardening and regular monitoring for unusual behavior in the application.
For a more comprehensive security strategy, organizations can consider engaging in penetration testing to identify similar weaknesses.
Detection Guidance
Monitor application logs for unusual entries, particularly those related to the stock location configuration. Look for indications of script injections or unexpected outputs in user interfaces.
Behavioral anomalies in user sessions, especially those involving unauthorized access attempts, should be investigated promptly.
AppSecure Threat Intelligence Insight
The long-term significance of this vulnerability underscores the importance of secure coding practices in web applications. Developers should prioritize input validation and output encoding as foundational security measures.
This vulnerability represents a trend in the exploitation of web applications, where insufficient input sanitization leads to severe security flaws. Security teams should be proactive in reviewing code and implementing security best practices.
For further insights on securing your applications, consider reviewing our secure coding practices guide. Implementing these practices can significantly reduce the risk of vulnerabilities such as XSS.
Additionally, organizations can benefit from our penetration testing methodology to enhance their security posture and prepare for potential threats.
Overall, addressing web application vulnerabilities remains a critical component of organizational security. Regular assessments and training can help mitigate risks and improve resilience against emerging threats.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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